Knockout mechanism



July 13 1926. A

R. L. WILCOX KNOCKOUT MECHANISM Filed May 19, 1924l SIW/mld Patented .uiy 13, i926?.

' partenariats-s satana carica.

V LIICI-YARI) LESTER WILCOX. OF VATEEBURY, CONNECTICUT, ASSIGNOR TO. TH Y. WATERBUBY FARREL FOUNDRY AND MACEINE COMPANY, OF EVATERBURY,

..CONNECTICUT, A CORPORATION' OF CONNECTICUT,

KNO CKOUT MECHANISM.

Application filed May 19, 1924:. Serial No. 714,525..

vMy invention relates toa new and iniproved knockout mechanism ,of the type used upon heading. or upsetting machines, although not limited thereto. f It is the object of thisinvention, among other things, to provide a knockout, mechanism, which may be readily adjusted for different lengths of blanks, will be positive in its operation, and maintain constant contact with" the source of power mechanism and withoutvundue wear,noise, shock or strain thereon, or to adjaoentparts, and in these and in many other ways, to produce a mechanism Vof this character that will be much more highly etlicient than any heretofore provided, have the maximum and a predetermined` adjustability, and composed Vof parts that are simpleof construction, and accessible both for either adjustment or replacement. i

To these and other ends, myV invention consists in the knockout mechanism, having certain details of construction and combinations of parts, as will be hereinafter described, and more particularly pointed out in the claims. f Referring to the drawings, in which like numerals of reference designate like parts in the several figures;

Figure lis an elevation of my improved knockout mechanism shown as associated with a header or upsetting. machine of al well known type; Y

Figure 2 is a plan view` thereof, the parts in section being taken generally upon line 2-2 of Figure l;

Figure 3 is a detail sectional plan view of a portion Vof the lever mechanism and some adjacent parts, those in sectionbeing taken generally upon line 3-3 of Figure l; and

Figure 4 is a detail plan View of the foillower cam lever, and adjacent parts, those in section being taken generally upon line 1lt of Figure Heretofore knockout mechanism of this general character has been constructed with a single cam, that is, the knockout cam, and the roll upon the knockout lever is held in contact therewith by an arm upon the 0pposite side of the lever fulcrum and having a tension spring attached thereto and to an y adjacent fixed part.

t is designed thati this springshould maintain the cam roll in constant contact with the cani. The strain upon the spring, however, is so great thatv it frequently breaks, causing damage and injury to the parts, and when the machine is running at a relatively highV speed the tension of the spring is not suiiicient to keep the roll in contact with the cam. This results in the roll leaving` the cam and returning thereto with a hammering action or shock, .which injures the face of the cam as well asthe roll and lcauses an undue and unnecessaryl strain and shock upon all of the parts. In addition to this, variation of movement of the Vknockout mechanism can only be ob tained by the slow and unsatisfactory shiftand try method, which consumes considervable time, during which the'machine is nonproductive, and results in the loss of a subn stantial `amount of stock.

These, and other objections tothe knockout mechanisms in the prior art are overcome in my improved mechanism herein shown and described.

In the drawings, l() designates a portion of the body of a heading or upsetting machine or the like, which may be of any convenient form or type, in one end of which is a die ll, having a. knockout pin l2 projecting therethrough in the rear of which is a knockout rod 13. 85

Mounted in the bracket 14, connected with the body l0, is a knockout lever 15,l which is journaled upon a readily removable pin 16 or other suitable means.

The mechanism just described is well known in the art and constitutes no part of my present invention.

Journaled in the body l0, is a shaft 17 having iiXed on the outer end thereof a `means ot the nut knockout cam 1S and a follower cam 19. These cams are shown as being separate elements but they may in r'act be made integral with each other ir desired. For convenience in manufacture, and to insure a proper alignment with each other l preferably secure them together l y tl e screws 20 or similar means.

A stud 21 is secured in the body 1() by 22, or the like, and upon the outer end thereof is a bushing Q3, upon which is journaledthe knockout lever 2-1 and the iollower lever 25. A nut 26 upon the stud 21 prevents axial movement ot this bushing and both o't` the levers in one direction.

Fixed in the knockout lever 24 is a stud 2T- upon which is rotatablyy mounted a cam roll 28, which rides against the tace oi the knockout cam 1S.

In the follower' lever is a lixed stud 29 having a cam roll 30 mounted thereon which rides "gainst the Yface ot the follower cam 19.

Movably mounted within the bore 31 in the iollower lever 25 is :r plunger 32, which isA projected outwardly by the spiing 33 within said bore, the tension ot which is varied by means` @t the screw Si, and between the inner end ot' which and said spring is` adisk or washer 35. As the sha'tt 17- rotates, an oscillating movement is imparted to the knockout lever ist through the cam roll 18. As both ol the levers` 24; and

' 25 rotate about a common axis, all oir the cam rolls` are maintained in constant contact with the tace of each ot the cams through the plunger 32 and spring 33, the tension of whichy is varied as may be desired to insure proper 'functioningI ot the parts relatively to each other.

By this simple and ellective mechanism the lever 2li is assured ot a proper oscillating movement, and the roll thereon is in constant contact with the knockout cam and there maintained by means or the follower cam and yielding mechanism which latter has such a limited movement that it will always operate unit'ormly irrespective ot the speed ot' rotation of the cam. By reason ofi the spring actuated plunger mechanism between the two levers, it is notv` necessary that the shape of the 'follower cam 1S) should be anything more than approximate, as any irregularity in its shape will be taken up in the spring 33.

In an opening in the lever Q1 is a block 3T, adjustable in a well known manner through a screw SS rotated by a crank handle 3S). One tace ot the lever adjacent tothe opening 3G is graduated as shown at 40, and preferably marked by ligures to indicate various lengths ot' movement ot the knockout mechanism.

Fixed to the block is an indicator' finger Lt1 which registers with these graduations during the movement of the block.

fovably mounted relatively to the body 1t) upon one side thereo'tl is a slide 12, the outer end olf which travels in the path ot movement olE the lever 15 and is connected with the biock 3T by means oi an adjustable connection comprising the threaded rod 43 pivotally connected with the slide 12 by a stud 'st-t or the like, a threaded rod l5 connected with the block 3T by the pintle4 6 or the like, these being` joined-at their inner ends by a turnbuckle L17 of the' usualv construction, and held against premature movement by jam nuts 4S. Thus an oscillating movementot theknockout lever :2i produces a reciprocatory movement ot the slide 42 and a rocking movement toy the knockout lever 15, and a straight forward movementl to the knockout rod 13 and knockout pin 12. This latter pin thus ejects the blank trom the die 11 in timed relation with the other parts of the header or upsetting machine. An adjustable stopv 4l) limits the movement of the lever 15 in the reverse direction.

`Within the scope ot the appended claims modilications and alterations may be iliade in the detailed construction ol my improved mechanism and l would therefore have it understood that' l do not limit myself to the exact construction herein shown and described.

What l claim as new and desire to secure by Letters Patent, is

1. in mechanism of the character described; companion cams rotatable about a common axis, companion rock members rotatable about a common axis, each of said rock members having a part thereon upon one side ot their common axis in Contact with one oli said cams, and'yieldingr means between said rock members upon the opposite side oi' said common axis, whereby said rock members are moved relatively to'each other.

2. In mechanism of the character described; companion camsv rotatable about a commonv axis; companion rock members r0- tatable about a common axis and independently or each other, each of the rock menibers having a partv thereon in contact with one oi said cams; a plunger' mounted in one ol the rock members; a yielding member that applies pressure to the plunger and holds the same in Contact with the other rock member and by reason thereofA causes the rock members to move upon their common axis; and means for varying the tension of said yielding member, the relative positions ot the rock members about their axis when under the influence ot the pressure means being limited only by said cams.

In mechanism of the character described, companion cams rotatable about a cams; a member mounted to move freely in one of the rock members at an angle to the said face thereof:l and in engagement With 10 the corresponding face of the other rook member; and Variable pressure means for actuating Said member in one direction; In testimony whereof, I have hereunto afiixed my signature.

RICHARD LESTER W'ILCOX. 

